Adjustable cam



April 29, 1924., I 1,492,492

E. E. TALBOT ADJUSTABLE 0AM 5 Sheets-Sheet l ii-I J77 veiz'z April 29, 1924. 1,492,492

E. E. TALBOT ADJUSTABLE CAM Filed Dec ii, 1922 s Sheets-Sheet 2 April 29, 1924. 1,492,492

E. E. TALBOT ADJUSTABLE CAM Filed Dec. 11 1922 7 s Sheets-Sheet a JEJvQa LM,

Fatented Apr. 29, 1924.

1,492,492 mm 1 OFFICE.

nvaarsrn n- TALBOT,. or ram. RIVER, MASSACHUSETTS.

ADJUSTABLE 0AM.

Application filed December 11, 1922. Seriallqo. 606,106.

To all whom it may concern .1

Be it known that I, EVARISTE TALBOT, a citizen of the United States, residing at, Fall River, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Adjustable Cams, of which the following is a specification, reference being had thereinto the accompanying drawings. V

My invention relates to adjustablecams, and, more especially, to such 'asuare embodied in a loom for operating the pickerstick thereof, and as are removably connected to the cam-shaft,

The primaryobject of my invention is'to provide a cam that may be adjusted in numerous positions in relation .to the cam-shaft; and that maybe removably secured to the cam-shaft; while the second object is to provide a cam, of the above-mentioned capabili: ties, that hastwo or more cam-surfaces delivering two or more blows for each revolu-, tion of the cam-shaft; and, when in operative position, has the weights'of its various parts arranged so as to. form a balanc'edro tatable body, thereby reducing the reaction of the cam-shaft on the'cam shaft gear and crank-shaft gear, hence diminishing the vibrations of the loom, the looseningof its parts, and the breakage of the teeth ofthe gears, due to the blows struck-by the "cam: point while operating .the picker-stlck. Other objects of my inventionwill appear hereinafter. r v

Inthe drawings illustrating the principle of my invention and the best mode now known-to me of embodying'the same in op, erative structure,

Fig. 1 is a rear elevation of my invention; Fig. 2 is a vertical section on line 22 Fig.1; H

Fig. 3'shows my invention in; front elevation; Fig. 4 is a front elevation of my, invention, one of the cam-point members being moved out of engagement with, and away from, the hub-plate and the cam-plate mem-' bers; while I Fig. 5 is a like .view oftwo, cam-po1nt members, and one cam-platemember ofwthe cam-plate,'being movedout of engagement with,and awavfrom the--.hub-plate;.- Fig. 6is'a'likeview of thehub plate; 7

Fig. 7 showsin rear elevation, .the'two cam-plate members of the cam-plate;

Fig. 8 shows a rear elevation of the modified form of my invention, where there is only one cam-point member.

A hub-plate l, in the form of a disc, is fixed, as by set-screws 2, to a cam-shaft 3, suitably mounted'in hearings in a loom, not shown. On its operating face is a series of raisedradial locking corrugations 4, designed to interlock with similar corrugations 5 upon a cam-plate 6. This plate con sists of two cam-plate members'7,y8,yand two cam-point members 9, 10, all of which, when secured together, form a pick and pick cam, such, for example, as is required on pick and pick box-looms. Eachcam-plate member is somewhat segmental in form, and, when in operative position, in relation to the hub-plate, the chord 11 of segment 8 is parallel with chord 12 of segment 7, andis adjacent to the hub 13 of the hub-plate 1. Each cam-point member, as 9 and 10, has two parallel sides, as 14, 15, andlfi, 17 respectively, that fit those of the opening formed between the cam-plate members 7, 8; and also a semi-circular bore as 18 and 19, to fit the side. of the hub 13 of the hubplate 1. These chords and sides are pref erably parallel, to obviate the tendency of the cam-point member to work loose, were they at an acute angle. 7

The hub-plate has four adjusting slots, 20, 21, 22 and 23, and, as here shown, each may be separated from that next adjacent, as by 90 degrees. Corresponding to these are four bolt holes 24,25, 26, and 27, one in each of the two cam-plate. members, and of the two cam-point members, for the reception of suitable bolts, with washersand nuts, when the members are in operative position in relation to the hub-plate; also there are corresponding bolt holes 28, 29, 30 and .31, in the cam-point members 9, l0, and cam platemembers 7, 8, and bolts to pass through these holes,-and be there securedby washers and nuts; the radi'al'corrugations 1, 5, of the adjacent faces of the hub-plate 1 and the entire cam-plate 6, adjustably interlocking, and all of the parts becoming rigidly bound together. 1 I 1 The method of using this embodiment of my invention has alreadybecomeobvious, probably. Should it be necessary to remove either one or both of the cam-point members, see Figs; 4 and .5, then all that is required, isa removal of the two bolts passing through one or both of said members; and a longitudinal movement of said member or members; this disengages the interlocking corrugations, and each cam-point member may thus be freed. It is -to be noted that the cam-plate members 7 and 8, Fig. 1, remain locked to the hub, so that when the campoint member, new or old, is replaced in its respective slot, the timing of the operation of the cam remains as originally determined.

Should it be essential that one or both of the cam-plate members he removed, then, in addition to the removal of the cam-plate just described, the bolts securing the camplatemembers 7 and 8, Fig. 5, to the hubplate 1, are taken out, the cam-plate members first moved longitudinally of the hubplate, enough to disengage the locking corrugations, and then movediaway fromthe camshaft 13, Fig. 5.

To replace the cam-plate membersand/or the cam-point members, a reversal of the above-described operation is to be pursued.

Attention is called to the following facts :That notwithstanding the hub-plate is secured to the shaft by set screws, the cam-plate 6 may, within certain limits, be advanced or retarded in relation to thehub plate, by reason of the bolts and adjusting slots 20, 21, 22 and 23, Figs. 4, 5 and 6, in the hub-plate 1; that the-cam-plate can be removably secured to the hub-plate, in any one of four positionsgsay 9O degreesapart; that the'slots in the hub-plate'are elongated circumferentially,and permit a general adjustment, forward and back, at any one of said four positions, 90 degreesapart.

It is also to be noted that because eachcaniplate-member and its cam point-member are like the other cam-plate member and campoint in form and weight, the cam-plate becomes a balanced rotatable body, and the cam-shaft turns evenly in-its bearings.

Should the entire cam-plate have. to be removed from the hub-plate,it can be so removed, and also replaced, without interfering with the timing of the other moving parts of the loom, provided that before the removal, suitable marks are made on the cam-plate and hub-plate to indicate their proper co-operating positions. I

To change or replace my pick-cam-plate requires not more than twenty minutes. If only a cam-point member has toberemoved, returned or replaced, plainly a much shorter time is needed.

It is to be noted that no machine work is required on the cam-point member or'the cam -plate members, for they are castings, the only machine work being boring and reaming the hub-plate, which practically never has to 'be removed from the shaft.

In short, my invention is durable, cheap in cost, quickly changed or replaced in the loom, and reduces greatly the losses arising from the use of pick cams heretofore used.

In Fig. '8 is shown what, at first glance, would seem to be identical with the invention described and claimed in a pending application for U. S. Letters Patent No. 523,- 830, filed by me December 21, 1921; but it is not identical, for the reason that it may be adjusted forward or back in any one of numerous different positions, say 90 degrees apart, in relation to the cam-shaft or hubp'la'te, whilethe cam mentioned in said application is adjustable forward and back, only in one position.

Desiring to protect my invention in the broadest manner legally possible, what I claim is:

1. A pick-cam having a hub-plate fixed to the shaft of a loom; a cam-plate; a parallel-sided opening extending from the hub of the hub-plate so as to form an opening with parallel sides, to the end of thecam-surfaee, to permit (the removal or the replacement of the cam-plate without disturbing the operative position of the cam-shaft; a cam-point member having parallel sides permitting said member'to be moved into operative position in said opening in the cam-plate; means for securing the cam-plate and cam-point member to the hub-plate in any one of three or more different positions; and means whereby "the said cam-plate and cam point member may, in any one of said three or more of said positions, be adjusted forward or back, in relation to the -hub-plate.

2. A pick-cam having a hub-plate fixed to thecam-sha'ft of a loom, and havinglocking corrugations upon its operative face; 'a carn plate having a parallel-sided opening; a cam-point member having parallel sides permitting said member 'to be moved into operative position insaid side opening of the ca'm plate; locking corrugations upon the cam-plate and the cam-point member to engage the corresponding locking corrugations upon the face of the hub-plate; and means for securing in looking engagement, the cam-plate and the cam-point member to the hub-plate in any one of various circumferential relations to the hub-plate.

3. A pick-cam comprising a hub-plate; and a double cam-plate made up of a pair of cam-plate members and a pair of cam-point members, each with a portion of the entire double cam surface; means for 'removably securing the cam-plate members to the hubplate so as to form an opening withparallel sides extending from the hub of the hubplate'to the opposite ends of the cam surface; each of the cam-point members having sides to engage the'sides of the said opening, and having its cam-surface continue that of one cam-plate; and means to secure each cam-point member to the hub-plate; all designed to form a balanced rotatable body,

and to permit said members to be removed, or replaced, without disturbing the operative position of the cam-shaft.

4:. A pick-cam having a hub-plate fixed to the cam-shaft of a. loom, and having locking corrugations upon its operative face;

va cam-plate having a parallel-sided openin a cam-point member having parallel si es permitting said member to be moved into operative position in said side opening of the cam-plate; locking corrugations upon the cam-plate and the cam-point member to engage the correspondin locking corrugations upon the face of the hubplate; and means for securing in looking engagement, the cam-plate and the cam-point member to the hub-plate in any one of four positions in circumferential relations to the hub-plate.

5. A pick-cam comprising a hub-plate; and a double cam-plate made up of a pair of cam-plate members and a pair of campoint members, each with a portion of the entire double cam-surface; means for removably securing the cam-plate members in different positions in circumferential relations, to the hub-plate, and so as to form an opening with parallel sides extending from the hub of the hub-plate to the opposite ends of the cam-surface; each of the cam-point members having sides to engage the sides of the said opening, and having its cam-su face continue that of one cam-plate; and means to secure each cam-point member to the hub-plate; all designed to form a bal anced rotatable body, and to permit said members to be removed or replaced without disturbing the operative position of the cam-shaft.

6. A pick-cam for a loom, coinprising a hub-plate; and a double cam-plate made up of a pair of cam-plate members and a pair of cam-point members, each with a portion of the entire double cam-surface; means for removably, securing the cam-plate members in any one of four positions in circumferential relations to the hub-plate and so as to form an opening with parallel sides extending from the hub of the hub-plate tothe opposite ends of the cam-surface; each of the cam-point members having sides to engage the sides of the said opening and having its cam-surface continue that of one cam-plate; and means to secure each campoint member to the hub-plate; all designed to form a balanced rotatable body and permit said members to be removed or replaced without disturbing the operative positions of other parts of the loom.

In testimony whereof I hereunto afiix my signature.

EVARISTE E. TALBOT. 

